Clutch noise such as whistling or clunking is not always an indication of a defective clutch. Whistling noises may e.g. also be caused by off-center contact of the clutch release bearing, a non-centered transmission input shaft or a defective pilot bearing.
Rattling noises may be due to load alterations if clutch disks are furnished with preliminary dampers. These noises do not impair the function or service life of the clutch disk.
Additional possible causes include installation of the wrong parts, or installation of the clutch disk in the wrong position.
- Correct part installed?
- Correct installation position?
- Pilot bearing installed and in good condition?